DE202023102119U1 - Variable shoe with last and mold for manufacturing the shoe - Google Patents

Abstract

Shoe (1) comprising an upper (11) and a sole (12), wherein the upper (11) is connected to the sole (12) by means of a separable zipper (4) and can be removed from the sole (12) by opening the zipper (4). 12) is detachable, characterized in that the zipper (4) is connected to the sole (12) by the sole (12) being injected or cast onto a part of the zipper (4), or by the sole (12) being um a part of the zip fastener (4) is overmoulded, or in that a part of the zip fastener (4) is overmolded by the sole (12).

Description

The invention relates to a shoe according to the features of the preamble of claim 1, and a last for the shoe according to the features of the preamble of claim 2, and a mold for manufacturing the shoe according to the features of the preamble of claim 3.

Two-piece shoes that have an upper part, also called a topper, that can be removed from the sole are known from practice. For example, the EP 2 134 204 B1 a shoe that has a removable upper and sole connected by a zipper. In order to give the shoe the necessary stability, the sole has a support plate. A production of this multi-part shoe is correspondingly complex and therefore expensive.

From the utility model DE 20 2009 010 097 U1 a shoe is known whose upper part can be removed in order to convert the shoe from a sneaker into a ballerina. Here, too, the upper part is detachably fastened with a zipper.

Furthermore, the utility model shows DE 20 2019 000 298 U1 a variable shoe in which the upper part is detachably attached to the sole with a zipper. This utility model teaches that the shoe has a magnet in the heel area of the topper and sole to secure the zipper in the closed position.

With the previously known two-part shoes, it is necessary to glue the zip fastener to the sole in a separate production step. As a result, the production of such a two-part shoe is relatively complex and error-prone.

It is the object of the present invention to create a shoe with an upper that can be removed from the sole by means of a zip fastener, which is of robust construction and at the same time allows cost-effective and resource-saving manufacture.

This object is achieved according to the invention by a shoe having the features of claim 1, as well as by a last for manufacturing a shoe according to claim 2, and a mold for manufacturing a shoe according to claim 3.

According to the invention, a shoe is proposed, the shoe having an upper part which is connected to the sole by means of a separable zipper and can be removed from the sole by opening the zipper. It is essential that the zip is connected to the sole by the sole being injection molded or cast onto a part of the zip, or by the sole being overmolded around a part of the zip or by the sole being cast around a part of the zip.

By injecting the sole or casting the sole onto part of the zip fastener, the zip fastener is already mechanically firmly connected to the sole together with the manufacturing process for producing the sole. According to the invention, an additional work step to connect the zipper to the sole is no longer necessary. In addition, the connection made by injecting the sole or casting the sole onto the zipper is mechanically very resistant and robust. This means that the shoe manufactured using this manufacturing process has high mechanical stability and a long service life. Injecting or casting on the sole is preferably understood to mean that the sole material is introduced in a liquid state, which then hardens to form a solid sole.

In particular, no separate manufacturing step for connecting the zipper to the sole is necessary. The sole is preferably not glued or sewn or welded to the zipper.

Another advantage of the shoe according to the invention is that the visible part of the zip fastener is relatively small, since the majority of the zip fastener is encapsulated by the sole and the finished shoe thus has a visually pleasing design. In addition, the zipper can be hidden by a bead formed on the sole and/or a flap formed on the upper, so that the external appearance of the shoe manufactured according to the method of the invention hardly differs from a conventional shoe with the sole firmly attached to the upper differs.

In particular, a separable or divisible zip fastener can be used as a zip fastener, which has two halves, each of which has a textile strip which carries a toothed strip or staples or carries closing elements. The closing links or staples are connected or disconnected via a sliding carriage. The zipper can be separated into two halves by unhooking. In particular, one half of the zipper is placed on the sole and the other half of the zipper is placed on the upper. To connect the upper to the sole, thread the zipper together and closes it in a known way by moving the carriage. This will connect the upper of the shoe to the sole through the zipper. The zipper can be designed as a metal zipper or a plastic zipper.

It is advantageous that the upper part of the shoe, also called a topper or upper part of the shoe, can be removed from the sole, for example to clean it or to clean the sole separately. Another advantage is that the sole can be easily replaced for repair purposes.

In a preferred embodiment, it can be provided that a multi-part mold is used to produce the shoe, which comprises a last, a lower part of the sole and at least one side part or several side parts, and the lower sole part, the side part or the side parts and the last together form a sole chamber, and wherein the last and/or the at least one side part or the several side parts has or have a circumferential groove, and a toothed strip of the zip fastener is inserted into the circumferential groove in such a way that a textile strip of the zip fastener downwards into the sole chamber protrudes.

In particular, it can be provided that after the toothed strip of the zip fastener has been inserted into the groove, the mold is closed and sole material is then injected or poured into the chamber and cured there, with the textile strip of the zip fastener being connected to the sole material as the sole material cures. In particular, injection of the sole material means the introduction of the sole material in liquid form under a higher pressure than normal pressure. Pouring in the sole material means in particular the introduction of the sole material in liquid form under normal pressure.

The sole can be different. In particular, different soles can be provided which differ in their properties with regard to cushioning and/or sole profile. Preferably, the sole profile of the shoe can be shaped by the bottom part of the sole. For this purpose, the bottom part of the sole can have a profile that serves as a negative mold for the sole profile.

In an advantageous embodiment it can be provided that the sole is interchangeable, in particular that different soles with a different sole profile are provided, which are interchangeable. Thereby the character of the shoe can be changed, for example by providing a first sole with a coarse sole profile and a second sole with a fine profile, for example a knife cut profile or a sole with a smooth profile.

Advantageously, it can be provided that the sole is constructed from different materials, with one material of the different materials or several of the different materials being introduced into the sole chamber before the sole material is injected or poured, or that several of the different materials are injected into the sole chamber one after the other or be poured in and harden there. For example, soles with different cushioning properties can be provided in order to create an adjustable sports shoe, for example. The cushioning properties of the sole can be adjusted according to the materials used in order to be able to individually adapt the shoe manufactured by the method according to the invention to different areas of application or types of sport.

Different materials can be used for the sole material. The decision for a specific type of material is preferably made on the basis of the desired cushioning properties of the sole. In addition, various cushioning elements can also be built into the sole in order to develop a specific cushioning property. Different sole materials can be combined with each other. Furthermore, combinations of sole materials with leather outsoles or rubber outsoles are also provided.

For example, the following materials can be used for the sole material: PU-Mono (polyurethane), PU-PU, PU-TPU (thermoplastic polyurethane), PU-TPE (thermoplastic elastomers), PU rubber, PU-TR (thermoplastic rubber), PU -Leather, TPU, TPE-U (Urethane-based Thermoplastic Elastomer), SEBS (Styrene-Ethylene-Butylene-Styrene), EVA (Ethylene-Vinyl Acetate), EVA-TPU, EVA-Rubber, PVC (Polyvinyl Chloride), TPS (Styrene Block Polymers) . This list is to be understood as an example and does not represent a final list or limitation of the possible sole materials.

It is advantageous that the sole design, the sole design and the sole profiles can be freely configured and can be varied according to the respective material properties of the sole material and the desired design within the scope of the craftsmanship of the person skilled in the art.

In one embodiment, it can be provided that an upper is provided which has a part of the separable zipper on its lower peripheral edge and the shoe is produced by connecting the upper to the sole by closing the zipper.

Various shaft materials can be used for the upper part of the shoe, also known as the topper or upper part of the shoe. For example, knitted materials can be used, or knitted materials, or textile, and/or leather, and/or synthetics, and/or polyurethane, and/or PVC film, etc. can be used. A combination of these materials can also be used to form the upper of the shoe.

The upper part of the zip fastener can be attached to the upper part of the shoe or the upper by sewing or by high-frequency welding or by gluing.

Advantageously, it can be provided that the shoe upper has a strap on its inside, in particular a circumferential strap, in order to cover and/or cushion the toothed strip of the zip fastener. Alternatively or additionally, it can also be provided that the finished shoe has an insole which is designed in such a way that the edge of the insole covers the toothed strip of the zip fastener. Provision can advantageously be made for a waterproof zipper to be used as the zipper. This also makes it possible to produce water-resistant or waterproof shoes.

Provision can advantageously be made for a cap to be sewn and/or welded and/or glued inside the shaft in the heel region of the shoe, with the cap being designed to cover the zip fastener. In particular, a cap made of plastic or similar materials can also be provided in the sole or in the area of the sole by means of pins or one or more magnets in order to cover the zip fastener.

Furthermore, the idea according to the invention also includes a last for producing a shoe, the shoe having an upper which can be connected to the sole by means of a separable zip and can be removed from the sole by opening the zip, in particular for producing a shoe using the method as previously described. It is essential that the strip has a circumferential groove on its lower circumference for inserting a toothed strip of the zipper.

The last can be made of different materials. For example, wood and/or metal (e.g. aluminum or steel) and/or plastic (e.g. HDPP or polyester resin or epoxy resin) or combinations thereof can be used as material for the last. The last can be made by manufacturing the last by 3D printing or by turning the shape of the last, or milling the shape of the last. Manufacturing the last in a casting process is also conceivable.

It is further provided that the idea according to the invention also includes a mold for producing a shoe, the shoe having an upper part which is connected to the sole by means of a separable zip and can be removed from the sole by opening the zip, in particular for producing a shoe according to the procedure described above. What is essential here is that the mold has a lower part of the sole and a side part or several side parts, with the side part or several side parts laterally delimiting the lower part of the sole in order to form a sole chamber and that the side part or the side parts have a circumferential groove in order to form a toothed strip to insert a zipper.

The side part or the side parts of the mold preferably form a mold ring. The form ring encloses the lower part of the sole and delimits it laterally. A groove is preferably worked into the mold ring, ie in the side part or side parts of the mold, in order to be able to insert the toothed strip of a zip fastener in such a way that the textile strip of the zip fastener protrudes into the sole chamber. As a result, the sole material can be injected or poured in when the sole mold is closed, so that after the sole material has hardened, the zip fastener is firmly connected to the sole.

The groove for inserting the toothed strip of a zipper can either be provided only in the strip or either only in the mold ring or one side part or several side parts of the mold or in a further embodiment both in the strip and in the mold ring, i.e. in be provided in a side part or in several side parts of the mould.

In particular, it can be provided that the groove is arranged at a constant distance from the surface of the bottom part of the sole, in particular special is designed as a closed circumferential groove.

It can advantageously be provided that the bottom part of the sole and/or the side part or parts are movably mounted in such a way that they can be closed and opened in order to form a sole chamber in their closed position together with a last, in particular a last as described above .

Furthermore, the idea according to the invention also includes a construction kit for a shoe, in particular a shoe manufactured according to one of the examples described herein, the construction kit comprising at least one shoe upper and at least two different soles, and/or at least one sole and at least two different shoe Includes uppers, wherein the shoe can be produced by connecting one of the shoe uppers to one of the soles by means of a zipper.

For example, the construction kit for the shoe can be designed as a sales unit, so that the construction kit is offered in a shop or in a shoe store as a set for the shoe manufactured by the method according to the invention, which comprises at least one upper and at least two different soles, for example to show the character to adjust the sole. Alternatively, it can also be provided that the construction kit or the set for the production of the shoe is offered by offering at least two shoe uppers and a sole in order to be able to customize the design of the shoe. Of course, the construction kit or the sales set can also be offered with a variable number and type of shoe uppers or soles in order to give a customer the opportunity to design the shoe individually.

In particular, it can be provided that the type of shoe and/or the design of the shoe can be changed by exchanging the sole for a different sole and/or by exchanging the upper for a different upper.

• 1 eine schematische 3D-Ansicht einer Vorrichtung zur Herstellung eines erfindungsgemäßen Schuhs;
• 2 eine schematische Darstellung des Einlegens des Reißverschlusses in die Nut eines Leistens;
• 3 eine Ausschnittdarstellung einer erfindungsgemäßen mehrteiligen Form;
• 4 eine alternative Ausgestaltung gem. 3;
• 5 eine schematische Explosionsdarstellung einer mehrteiligen Form;
• 6 ein erfindungsgemäßer Leisten;
• 7 ein erfindungsgemäßer Schuh.

The figures show exemplary configurations of the manufacturing method according to the invention and of the shoe produced by the manufacturing method and are described in the following description of the figures. show:

• 1 a schematic 3D view of a device for producing a shoe according to the invention;
• 2 a schematic representation of the insertion of the zipper into the groove of a last;
• 3 a detail view of a multi-part mold according to the invention;
• 4 an alternative embodiment acc. 3 ;
• 5 a schematic exploded view of a multi-part mold;
• 6 a last according to the invention;
• 7 a shoe according to the invention.

Different configurations and examples for implementing the invention are shown in the figures. These examples serve to illustrate the invention and are not to be construed as limiting it. It is clear to a person skilled in the art that he can modify and vary the configurations shown in the figures within the framework specified by the claims without departing from the basic idea of the invention.

1 1 shows a multi-part mold 2 for producing a shoe 1 according to the invention. A strip 3 is arranged on the upper side of the multi-part mold 2 . The parts of the multi-part mold 2 together enclose a sole chamber 24. The last 3 has a circumferential groove 31 into which a zipper 4 is inserted.

In the 2 an enlarged detail of the last 3 with the groove 31 is shown. Furthermore, in 2 indicated how the zipper 4 is inserted into the groove. The zipper 4 has a textile strip 41 on which the closing elements in the form of staples 42 are held. The groove 31 of the last 3 is designed to receive the fasteners or staples 42 of the zipper such that the fabric tape 41 of the zipper protrudes downward into the sole chamber 24 .

The 3 shows a section of the multi-part form 2. In the section you can see the last 3, which closes off the sole chamber 24 at the top and has a groove 31 into which the zipper 4 is inserted. The textile strip 41 of the zip fastener 4 protrudes downwards into the sole chamber 24. The closing elements 42 of the zip fastener 4 are received through the groove 31 of the last 3. The side part 22 laterally closes off the last and the lower part of the sole 23 . The bottom part 23 of the sole is arranged below the sole chamber 24 and forms the bottom of the sole chamber 24 .

The representation of the multi-part form 2 in 4 corresponds to the representation in 3 , with the difference that the groove 21 for inserting the zipper 4 is not arranged in the last 3 but in the side part 22. Otherwise, the representation of the 4 with the representation of 3 match.

Alternatively, configurations are also conceivable in which both the strip 3 has a groove 31 and the side part 22 has a groove 21 in order to accommodate the closing elements 42 of the zipper 4 .

In the 5 the multi-part device 2 is shown again in a perspective view. From this it can be seen that the side part 22 delimits the bottom part of the sole laterally and the last 3 is placed on from above in order to close off the sole chamber 24 on all sides.

Provision is made for individual parts of the multi-part mold 2 to be movably mounted, so that the mold 2 can be opened and closed. In its closed position with the zipper 4 inserted, it is provided that the sole 12 of the shoe 1 to be manufactured is formed by injecting or pouring sole material into the sole chamber 24 . The sole material then hardens and connects to the zipper 4 in such a way that it is permanently connected to the sole 12 that has been produced.

In the 6 a strip 3 is shown as an example. The strip can, for example, be made of a solid material such as metal or aluminum or plastic. The strip 3 has a groove 31 on its lower peripheral edge. The groove 31 is designed to be closed around the strip 3 all the way around. The toothed strip 42 of a zip fastener 4 can be inserted into the groove 31 in order to then connect it to the sole 12 in the multi-part mold 2 by a “direct injection” molding process or a casting process.

In the 7 a shoe 1 according to the invention is shown. The shoe 1 has an upper 11 and a sole 12 . The upper part 11 is connected to the sole 12 via the zipper 4. By opening and separating the zipper 4, the upper part 11 can be removed and exchanged for another upper part. It is also possible to leave the upper part 11 and replace the sole 12 instead. This makes it easy to adapt the shoe to different needs. For example, the shoe upper 11 can be exchanged for design reasons in order to modify the outer appearance of the shoe. Likewise, the sole 12 can also be exchanged, for example to convert a sports shoe from an indoor sports shoe into an outdoor sports shoe, by exchanging an indoor sole 12 for an outdoor sole 12 . It is also possible to exchange a plastic sole 12 for a leather sole 12 and to connect it to the upper part 11 . For this purpose it can be provided that a corresponding plastic layer is arranged on the upper side of the leather sole, which is connected to the zipper 4 in the multi-part mold 2 in the injection molding process or casting process. This also makes it possible, for example, to provide a sports shoe or sneaker with a leather sole and thus give the shoe a more formal appearance.

It is also possible, in the event of a defect in the sole 12, to exchange it for a new sole and thus to repair the shoe almost in no time at all. The shoe upper 11 or the topper 11 can also be exchanged in the same way should a defect occur on it. As a result, the shoe manufactured using the manufacturing method according to the invention can be repaired in a simple manner, so that resources and costs can be saved.

Reference List

1

shoe

11

Top, topper

12

sole

2

shape

21

groove

22

side panel

23

sole bottom

24

sole chamber

3

Afford

31

groove

4

zipper

41

textile strap

42

staples

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 2134204 B1 [0002]
• DE 202009010097 U1 [0003]
• DE 202019000298 U1 [0004]

Claims (11)

Shoe (1) comprising an upper (11) and a sole (12), wherein the upper (11) is connected to the sole (12) by means of a separable zipper (4) and can be removed from the sole (12) by opening the zipper (4). 12) is removable, characterized in that the zipper (4) is connected to the sole (12) by the sole (12) being injection molded or cast onto a part of the zipper (4), or by the sole (12) being a part of the zip fastener (4) is overmoulded, or in that a part of the zip fastener (4) is overmolded by the sole (12). Lasts for manufacturing a shoe, the shoe (1) having an upper part (11) which can be connected to the sole (12) by means of a separable zip fastener (4) and can be removed from the sole (12) by opening the zip fastener (4). is, in particular a last for the manufacture of a shoe claim 1 , characterized in that the strip (3) has a circumferential groove (31) on its lower circumference for inserting a toothed strip (42) of the zipper (4). Mold for manufacturing a shoe, the shoe (1) having an upper (11) which is connected to the sole (12) by means of a separable zipper (4) and can be removed from the sole (12) by opening the zipper (4). is, in particular for the production of a shoe according to claim, characterized in that the mold (2) has a sole part (23) and a side part (22) or several side parts, the side part (22) or several side parts forming the sole part (23 ) laterally to form a sole chamber (24) and that the side part (22) or the side parts have a circumferential groove (21) to accommodate a toothed strip (42) of a zipper (4). mold for making a shoe claim 3 , characterized in that the groove (21) is arranged at a constant distance from the surface of the lower part of the sole (23), in particular is designed as a closed circumferential groove (21). Mold for manufacturing a shoe according to any one of claims 3 or 4 , characterized in that the bottom part of the sole (23) and/or the side part (22) or the side parts are movably mounted in such a way that they can be closed and opened in order to work together with a last (3), in particular with a last according to claim 2 , form a sole chamber (24) in their closed position. shoe after claim 1 , characterized in that the sole part (23) forms the sole profile of the shoe. shoe after claim 1 or 6 , the shoe being manufactured by means of a multi-part mold (2), the mold (2) having a bottom sole part (23) and at least one side part (22) or a plurality of side parts (22) and a last (3) in order to form a sole chamber ( 24) to manufacture the sole by injecting or pouring in sole material, preferably that the shoe using a mold according to claim 3 and/or using a last claim 2 is produced, characterized in that the strip (3) and/or the at least one side part (22) or the several side parts has or have a circumferential groove (21, 31), and in the circumferential groove a toothed strip (42) of the zip fastener (4) is inserted in such a way that a textile strip (41) of the zip fastener (4) protrudes downwards into the sole chamber (24), after the insertion of the toothed strip (42) of the zip fastener (4) into the groove (21, 31) the mold (2) is closed and the sole is formed by injecting or pouring sole material into the sole chamber (24) and curing it there, with the textile strip (41) of the zip fastener (4) connecting to the sole material as the sole material cures . shoe after claim 7 characterized in that the sole (12) is constructed from different materials, one of the different materials or a plurality of the different materials being introduced into the sole chamber (24) prior to the injection or pouring of the sole material, or that a plurality of the different materials being introduced into the Sole chamber (24) are successively injected or cast and harden there. shoe after one of Claims 1 , or 6 to 8, characterized in that the zipper (4) is designed as a waterproof zipper or a water-repellent zipper. Construction kit for a shoe, in particular a shoe (1) according to one of Claims 1 or 6 until 8th , wherein the kit comprises at least one shoe upper (11) and at least two different soles (12), and/or at least one sole (12) and at least two different shoe uppers (11), wherein the shoe (1) through Connecting one of the shoe uppers (11) to one of the soles (12) by means of a zipper (4) can be produced. Building kit for a shoe claim 10 , characterized in that the type of shoe (1) and / or the design of the shoe (1) by exchanging the sole (12) for another sole (12) and / or by exchanging the shoe upper (11) for a other shoe upper (11) is changeable.

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